Suction device for gathering molten glass



Sept. 20, 1932. R. w. CANFIE LD 1,878,576

SUCTION DEVICE FOR GATHERING MOLTEN GLASS Filed Oct. 11, 1928 I 0 II mww 0, 00 00 0 0 0 Witn ess:

Patented Sept 20, v 1932 UNITED STATES PATENT OFFICE,

ROBERT W. CANFIELD, OF WEST HARTFORD, CONNECTICUT, ASSIGNOR TO HARTFORD- EMPIRE COMPANY, OF HARTFORD, CONNECTICUT, A CORPORATION OF DELAWARE soc'rron DEVICE FOR GATHERING monrnn oLAss Application filed October 11, 1928. Serial No. 311,757.

This invention relates to such gathering devices employed in the manufacture of glassware, to separate a mass of glass of suitable size for' making a single article, from a pool ofniolten glass. This gathering de- Karl E. Peiler, on July 5, 1927. In the use of carbonaceous material for this purpose (hereinafter referred. to as the cup, irrespective of whether it is simply a. gathering device or. a preliminary shaping mold) care must be exercised to prevent chipping or defacing the cup material by contact with 00- operating metal parts.

The object of the present invention is to vprovide a suction gathering deviceof the character described, having the greater part vof its glass contacting surface formed of carbonaceous material and i which such parts of this cup as cooperate 0 contact with metallic moving parts, are provided with meing parts in a device of this kind, are a valve tallic contact portions. Such essential movfor closing the connection between the cavity of the cup and a source of suction, and, in some instances, a severing device which cuts the string of glass connecting that in the cup with that in the pool.

The object of this invention is accomplished by providing a suction cup or the like, of nonmetallic material, having a valve controlling the application of suction to the cavity of the cup with a metallic bushing forming that portion of the mold cavity which is engaged when the valve seats. When the glass in the cup cavity is severed by a blade which cooperates with the lower edge of thecavify, a metallic ring is provided to form the'wall of the cup cavity which contacts with the blade.

One embodiment of the invention for carrying out these objects and such others as may hereinafter appear is shown in the accompanying drawing, in which D Figure 1 is a vertical section through a suction gathering cup, the arm by which it is carried and a portion of the vessel containing a pool of molten glass;

Fig. 2 is a plan view of the bushing surrounding the valve;' I

gig. 3 is a sectionthrough the valve stem; an

Fig. 4 is a partial sectional view corresponding to Fig. 1, showing the cup as used with a sliding shear blade to sever protrudmg glass.

The gathering cup 5 is secured in an arm 6 by a clamping screw 7 and a partial vacuum is communicated to the cavity therein through an opening in the upperend. As illustrated, this cup would be usedfor delivering a gather of glass to a mold or other shaping device, but this invention comprehends the use of a cup which may be in itself a shaping mold, such as the blank or parison molds used in the wellknown Owens machines The lower open end of'the cup is moved into contact with the surface of apool of molten glass in a container 9 which may be stationary or rotary and the glass is drawn up into the cavity until the upper advancing end of the glass engages a valvelO which is lifted thereby to close the opening.- In order to prevent damaging the cavity wall by the valve, the opening is formed in a bushing 11 and the seat of the valve 10 is formed in the lower end of the bushing, thereby preventing the valve from engaging directly against the material from which the body of the suction cup is formed. Bushing 11 has a flange lla formed thereon which serves to reinforce the cup 11 and to provide an air-tight joint between the cup and the member 6, as will be obvious from Fig. 1. The flange 11a overlies the vertical opening in the member 6, and when the cup 5 is mounted in the said member, the engagement of the flange 11a with the top of the recess serves to hold the bushing in position in said cup.

' The valve stem 21 is provided with wings as shown in Fig. 3 and the upper end of the stem carries lock nuts 12 which may be ad embodiment of the invention is selected for justed to limit the downward movement of the valve. The upper end of the bushing is providedwith projections 13 to prevent the lock nuts from closing the opening when the valve is in its lower position. As illustrated, the" valve is moved to open or lowered position by gravity, but if desired a light spring may be provided to hold the valve normally in open position.

After the cavity has been filled with molten glass as has been described, the arm 6 is lifted from the surface of the pool by any suitable mechanism (not shown), and moved into position to deliver the gather to a mold or other shaping instrumentality. The string of glass connecting the gather and the surface of the pool may be severed after the cup has been lifted slightly by suitable severing devices which in themselves form no part of the pres ent='mvention. One such device is shown in an application filed by Karl E. Peiler on December 7, 1926, Serial No. 153,093, new Patent No. 1,692,858, dated November 27, 1928,

which shows a pair of shears spaced from the bottom of the cup and therefore not contacting therewith.

Another form of severing device is that used in Owens machines, in which a blade cuts off the glass by cooperation with the bottom of the cup. When this form is used, the 7 present invention contemplates the provision of a metal ring with which the severing blade contacts so as to prevent wear or damage to,

the lower end of the nonmetallic cup.

As shown in Fig. 4, the cup 5 is provided at its lower end with a ring 15 against which a blade 16 slides to produce a shearing action therebetween. The ring 15 may be permanently attached to the bottom of the cup, or if the opening of the ring is smaller than that of the cup, the ring may be removed to permit the delivery of the charge from the cup. Thus the ring 15 provides a metallic marginal edge for the cup cavity, with which the blade 16 coacts to sever the glass.

It is to be understood that the described the purpose of illustration only, and that various modifications may be made within the scope of the appended claims.

What I claim is:

1. A suction gathering device comprising a dipping member having a recess formed said cup by said bushing, a shear blade for severing a tail of glass depending from said cup, and a device movable into engagement with the entrance end of the cup cavity for preventing injury to said cup by said shear blade.-

2. A suction gathering device for reshaping mold charges, comprising a rigid piece cup of carbonaceous material secured to sa1d recess, said cup being longer than said recess, and having a cavlty formed suction I head having a recess formed therein, a onetherein for the shaping of mold charges and the delivery of the shaped charges through its bottom end, a flanged bushing rigidly mounted in the upper end of said cup, the

flange on said bushing being arranged for.

engagement by a part of the suction head, whereby the mounting of the cup in the head serves to hold the bushing in position, and a vacuumcut-oif valve in said bushing, said bushing serving to protect the cup from injury by said valve.

3. A suction gathering device for preshaping mold charges, comprising a rigid suction head having a cylindrical recess formed therein, a one-piece cylindrical cup of carbonaceous material mounted in said recess,

said cup projecting below said recess, means for removably securing said cup in said recess, said cup having a cavity formed therein for the shaping of mold charges and the delivery of the shaped charges through its bottom end, a flanged bushing rigidly mounted in the upper end of said cup, the flange on said bushing being arranged for engagement by part of said head, whereby the mounting of the cup in the recess of the head serves to hold the bushing in position, a vacuum cut-ofi' valve insaid bushing, a vacuum passageway in said head leading to said valve, said valve being arranged to be closed by the glass which is gathered in the cup, and said bushing serving to protect the cup against injury by the valve and to provide a seat for the valve.

4. Suction gathering apparatus comprising a suction head, a cup of carbonaceous material secured in said head, said cup having a cavity formed therein for the shaping of mold charges and for the discharge of such charges from the cup, the bottom portion of said cup projecting below the suction head structure, glass severing means,

and a metallic member adapted to be moved into contact'with the bottom of said cup to protect the cup from abrasion by said severing means, and said member being shaped to provide a bearing surface on its under side for said severing means.

Signed at Lancaster, Ohio, this 8th day of October, 1928.-

ROBERT W. CANFIELD. 

